Weatherproofing Corrugated Cardboard
"Joshua Putnam" wrote in message
It's pretty easy to do with canning wax and a big paint brush. Melt the
wax in a double-boiler and brush it onto the cardboard slowly so it
soaks in while it's still molten.
Commercially, corrugated is wax dipped for waterproofing for the seafood
industry. Your idea should work well.
|